72235LB15JI8

Overview

The Renesas Electronics Corporation 72235LB15JI8 is a synchronous First-In, First-Out (FIFO) memory device belonging to the 7200 series. It provides a storage capacity of 36K bits organized as 2K words by 18 bits. The component supports a maximum data rate of 66.7 MHz with an access time of 10 ns. It operates on a single 5.0 V supply voltage within a range of 4.5 V to 5.5 V and draws a maximum supply current of 60 mA. The device features uni-directional bus architecture and is housed in a 68-pin PLCC package.

Feature Summary

• Synchronous FIFO architecture with clocked read and write controls for reliable data buffering
• Programmable status flags indicating full, empty, and half-full conditions
• Uni-directional data bus interface supporting 18-bit word width
• Surface-mount PLCC packaging suitable for automated assembly processes

Applications

• Data buffering between asynchronous system domains
• Interface bridging in high-speed digital communication systems
• Temporary data storage in embedded processing applications

Procurement Notes

This component is officially designated as obsolete by the manufacturer. Procurement must rely exclusively on authorized distributors or secondary market suppliers holding existing inventory. Verify RoHS compliance status carefully, as legacy stock may not meet current environmental regulations. Confirm package authenticity and pin integrity upon receipt due to the component's discontinued status.

Selection Notes

Select this part only if legacy compatibility with the 7200 series is required. Ensure the design accommodates the 68-PLCC footprint and 5V logic levels. Consider that the synchronous nature requires a stable clock signal for both read and write operations. Evaluate alternative modern FIFOs if new designs do not strictly mandate this specific form factor and speed grade.

Part Context

The 72235LB15JI8 is part of the IDT/Renesas 7200 series of high-performance synchronous FIFOs. This family was widely used in telecommunications and networking equipment prior to industry shifts toward newer technologies. The 'LB' suffix typically denotes low-power CMOS technology, while 'J' indicates the PLCC package type. The series offers various density and speed options to suit different bandwidth requirements.

Replacement Considerations

Public confirmed substitute part numbers are not available for this obsolete component. Designers should consult Renesas technical support for potential pin-compatible alternatives or evaluate generic synchronous FIFOs with matching 2K x 18 organization and 68-PLCC packaging.